OPE 
jven in the performance; though the compofers had not 
difcovered the art of expreffing this latitude by the —— 
-charaéters or technical terms, which have fince -becom 
ene 
. Veechi livedin an age when a fugue and 
mitation was Irrefiftible. In as “of patie fuch con- 
‘elvan might have been tumed to account; but there is 
ftyle or movement from the beginning to 
e end of the piece. ‘The language is in general Modene/z, 
‘and not seen ag even to many Italians. 
Veechi’s mufic in five parts with that of 4 
» Giulio — and 
any 
eight anterior pieces o 
gining that Rinucemi took this drama for odel, as 
:dramas which Emilio del Cavaliere fet for sania fo earl 
a fpecies of 
fty le of Vecchi, 
which was precifely that _ Rinuccini a his learned 
Florentine friend wifhed to 
and — fc opera buffa was performed, in 
fil — we n able to afcertain. There 
was a mixture of comic charaters in almof{ all the mufical 
pila oF the lait century: however, in 1641, foon after 
the introdu@tion of rater operas upon the Venetian flage, 
we the comic opera of La Finta pazza, written 
Claudio Strozzi, and fet by Sacrati, and La Ninfa avara, 
written and fet to mulic by Benedetto oe in the lift of 
the mufical dramas of that year. And among thofe per- 
formed at Rome and Bologna, about the fame time, thoug 
the mufic is not eafy to find, bi words have been preferved 
in man The famous aa a 
a 
aq 
account, wit 
mufic 
during the lat pee med 
by Girdlamo horeabe aie di Resaella a 
and founder of the academy de’ Fi aril in that city, was 
performed in 1610, and Amore ae ventu, Scherz 
dra 1659; oa Giambatifta 
bo, 
ut the only real burlettas, which we have 
‘Dramma burlefea, fet by Piftocchi, 
¥672, which was reprefented at Venice by little figures of 
Diogeni, Dramma burlefca per Mufica, and 
Glafi in Optias, is fo cal ed from i ite ufe in play- 
hhoufes, and {ometimes-a diagonal perjpedirve, trom its con- 
alee ee which i is as fellows. 
bics C$, Fig. 2 WwOOG inche s'long E3 
in-each : fide of whieb there is-a-hole E F and:G@ H, exa&ly 
as ject: 
AS B C D (Plate XVI. Op- 
OPE 
proceed the rays Pu, ab, and Q d: thefe rays, being re- 
flected by the plane mirror I K, will thew the obje& in the 
direGtion ¢p, ba, d g in the i image p % Miley to the object 
. Q, and as far behind a goirror as the object is before 
it; the mirrer tbeing placed fo as to ee an angle af 
45 degrees with the fideo of the tube. And as in viewing 
near objects it is not neceflary to magnify them, the facal 
diftances a be the glaffes rg ai nearly equal; or if that 
e inches, ae to ~ oe the 
diftance heen pie will be but two inches, a 
S 
* 
will be magnified three times, which is faficient ie the 
purpofes to which this glafs is applie 
If the obje& be very near, as X Y, it is viewed through 
2 hole xy, at the other end of the tub without an 
eye-glafs; the upper part of the mirror ‘being polifhed fer 
that purpofe, as Te {crews 
fin 
The nobleft operation man is that by the {choolmen 
called vital, or immanent ; ‘the operation of the mind ; 
which, with regard to ce un cata, is threefald; ap- 
prehenfion or ale aa difcretion or — ands rea 
> foning or difcor 
| direton oF thefe makes the obje& of lo: 
ard to the will, the immanent oper: ose are 
willing ae nilling : to which are referred loving and 
gs 
“One ERATION, in Medicine, denotes qmalandicsl action of 
the hand on the human bo ody: in order to re-eftablifh 
o> 
ol 
2 
— 
ding is - os common, ‘but, at the fame time, a 
Posie opera 
Trepa 
caftrating, cutting for the fiftula, amputation, extirpation, 
cupping, &c e SuTURE, &e. 
OPERATION, High. See Hreu and a poe 
Operation, Lateral. See Lirnoro 
OPERATION is more particularly eran Medicine, for the 
means by which any remedy produces its-falutary effet; or 
that feries of actions, mediate and immediate, by whieh ite 
#emote end is attained. 
See the operations of each kind of medicines under the 
proper heads, Spxcrrics, Pureative, Emerics,'Orrates, 
&e. 
Ovcration, in Chemifyy. denotes the -proceffes, or.ex- 
periments, by means of ‘which-the proper changes are pro- 
duced:in bodies, and the effe&t-of the-art procured. 
The changes: chemiftry preduces in bodies, are eed: 
Munn a TON 
